iaas_update_vcf_cloud_account_async

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=false and destructiveHint=false, so safety is partly covered. However, the description never discloses the async nature implied by the tool name (that it returns a request tracker rather than the updated account), nor that the 'PATCH' body actually requires a large set of mandatory fields, which contradicts a typical partial-update assumption.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two extremely short lines with no filler and the resource is front-loaded, which is good. But the size is driven by under-specification rather than discipline; the endpoint string occupies a third of the available text without adding agent-facing value beyond the name.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

This is a mutating operation with a deeply nested required body and no output schema, yet the description says nothing about return behavior (async request), the effect of omitted fields, or credential/certificate requirements. With annotations covering only generic safety hints, the description is too thin for the tool's complexity.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and all three parameters (id, apiVersion, body) are documented in the schema, including every nested body property. The description adds no additional meaning about the body's required-field semantics or the apiVersion format, so the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description gives a specific verb and resource ('Update VCF cloud account') plus the underlying endpoint, so the agent knows exactly which resource family is touched. It does not differentiate from near-identical siblings such as iaas_update_vsphere_cloud_account_async or iaas_update_vmc_cloud_account_async beyond the provider token in the name.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this versus the create/delete VCF account tools or the other cloud-account update variants. The only implicit cue is the PATCH endpoint, leaving prerequisites (existing account, enumerated regions, valid vCenter/NSX credentials) entirely to inference.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.